Sunspot. Sunspots are temporary cooler areas on the Sun's surface caused by changes in its magnetic field.
Delis cactus is the correct way to write it.
<span>Heating food under a heat lamp is an example of heat transfer by
<span>Radiation</span></span>
Velocidad-es una cantidad vectorial física; Tanto la magnitud como la dirección son necesarias para definirlo.